| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a defect of a speaking interruption caused by elimination of one part of a sound signal in a conventional noise canceller when used under an environment with a high level of a background noise. SOLUTION: A noise is suppressed by a noise canceller A1 using Kalman filter algorithm adaptable to a low level of a background noise when it is in the low level, and the noise is suppressed by a noise canceller B2 using a speech processing system (SPAC) utilizing an autocorrelation function adaptable to a high level of the background noise when it is in the high level. |
